Gyrolite (Ca_8Si_(12)O_(30)(OH)_4 * 7H_2O) was hydrothermally prepared in a stirred suspension at 180°C using mechanochemically treated starting mixtures of lime and amorphous precipitated silica at the theoretical Ca/Si ratios of 0.67 for gyrolite and 0.50 for the Z-phase. The starting materials were treated by a planetary ball milling for 15 min to 8 h at room temperature. With an increase of the milling time, Ca(OH)_2 reacts with the silica to make a C-S-H like phase having a broad XRD peak centered at 0.30 nm. A C-S-H like phase contain partly sheet-like silicate anion structure. Using the mechanochemically prepared mixture, the hydrothermal reaction sequence is mechanochemically formed C-S-H → Assarsson's Z-phase → gyrolite for a Ca/Si = 0.50 and mechanochemically formed C-S-H → gyrolite for a Ca/Si = 0.67 without an intermediate Z-phase. However, using the mixtures at Ca/Si = 0.67 without milling, the hydrothermal reaction sequence is CaO + silica → typical hydrothermally formed C-S-H → gyrolite.
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机译：白钙沸石（Ca_8Si_（12）O_（30）（OH）_4 * 7H_2O）进行了水热在搅拌的悬浮液中的方法，用在180℃机械化学处理在为白钙沸石的0.67的理论的Ca / Si的比率开始石灰和无定形沉淀二氧化硅的混合物和0.50 Z相。起始材料通过行星式球磨机进行15分钟至8小时，在室温下处理。随着研磨时间，的Ca（OH）2下进行反应与二氧化硅做一个C-S-H等具有宽的XRD峰值相位中心在0.30纳米。像相A C-S-H包含部分地片状硅酸盐阴离子结构。使用机械化学制备的混合物，在水热反应顺序机械化学形成C-S-H→Assarsson的Z相→白钙沸石为的Ca / SI = 0.50和机械化学形成C-S-H→为的Ca / SI = 0.67白钙沸石而没有中间Z相。然而，使用在钙/硅= 0.67的混合物，而不铣削，水热反应序列为CaO +二氧化硅→典型水热形成C-S-H→白钙沸石。
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